Improvement in molding hollow ware



attach ed.

UNITED STATES PATENT OFFICE.

JAMES J. J OHNSFION, OF ALLEGHENY, AND JAMES V. CUNNINGHAM, OF FITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN MOLDING HOLLOW WARE.

Specification forming part oi" Letters Patent No. 11,044, dated June 6, 1854.

To @ZZ whom it may concern.:

Beit known that we, J AMES J. JOHNSTON,

of Allegheny, and J AMES V. CUNNINGHAM,

of Pittsburg, in the county of Allegheny and State of vPennsylvania', have invented a new and Improved` Mode of Molding Hollow Vare; and we do hereby declare that the following is a full and exact description thereof,

referencebeing had to the accompanying drawl ings, and to the letters of reference marked thereon.

The nature of our invention consists in the arrangement of a follow-board, core-box, and anchor, to facilitate the ramming of the core, and making of the parting at the mouth of narrow-necked hollow ware-such as saucepans, glue-kettles, and tea-kettles-the cores of which are held down by means of an anchor.

To enable others skilledv in the art to make and use our invention, we will proceed to describe its construction and operation. I

Figure 1 in the accompanying drawings is a sectional view of the various parts placed in proper juxtaposition. A is a part of a iiask, (commonly called the drag.) B is the follow-board, the raised part of which forms the parting at themouth of the desired casting. C is the core-box, used in connection with the pattern in forming the core. D is the anchor, used in holding the core steady while pouring the casting. The largest diameter oi" the anchor is at the top of the raised part ofthe follow-board rIhe anchor may be made hollow and perforated, to allow vent for escape of air or gas when casting. E is the cross-bar in the ilask, to which anchor is The anchor is held to its place by a pin or key. (Marked F.) The dotted line (marked X) shows how the flask should be cut for tea-kettles. Having thus arranged the different parts, we ram up the iiask or part of the ask called the drag,7 and place on a bottom board and reverse them, as seen in Fig.

2. Ve then remove the follow-board, and put on what is commonly called parting-sand. Then we ram up the core, after which we' remove the eore-boX. We then place the bottom part of the pattern over the core, set the cope of the iiask to its place, as seen in Fig. 3, set the gate or sprue, ram up the cope, and finish the mold in the usual way.

Fig. 2 represents the drag when rammed full of sand, ready for the core to be rammed up. C is the core-box. A is the drag of the iiask.- D is the anchor. E is the cross-bar. H is the bottom board. F is 4the key or pin.

Fig. 3 represents the drag and core rammed up,with the cope of the liask in its place; also, the pattern set over the core.

Fig. 4 is the follow-board. The openingin the raised part is made for the purpose of receiving the anchor. Fig. 5 is the core-box, and is made to correspond to the flask and pattern.

Fig. 6 is the bottom part of the pattern.

Fig. 7 is the top part of the pattern.

The advantages of our improvement is as follows: It saves the making of partings; it gives the molder facilities in ramming up the core which he cannot have in the old style of molding saucepans, tea-kettles, and glue-kettles, and saves the necessity of fitting in the open bottom, and also the trouble attending thc dressing out of seams in the mold caused by the open bottom. The anchor is also held steady when the core is being rammed up.

Vhat we claim as of our invention, and desire to secure by Letters Patent, is-

The arrangement of the follow board B, core-box G, and anchor D, operated as and for the purposes herein set forth.

JAMES J. JOHNSTON. JAMES V. CUNNINGHAM.

Attest:

J EEEMIAH FEEU, WILLIAM W. CAGUE 

